CN111149806A

CN111149806A - Mixed herbicide containing oxadiargyl and quizalofop-p-ethyl

Info

Publication number: CN111149806A
Application number: CN201911398345.6A
Authority: CN
Inventors: 郭海滨; 张坤; 李希若; 王敬
Original assignee: Nanjing Lvtu Biotechnology Co Ltd
Current assignee: Nanjing Lvtu Biotechnology Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-15

Abstract

The invention discloses a mixed herbicide containing oxadiargyl and quizalofop-p-ethyl and application thereof; the active ingredients comprise oxadiargyl and quizalofop-p-ethyl, wherein the weight ratio of the oxadiargyl to the quizalofop-p-ethyl is 1:80-80: 1; the weight ratio of the oxazalic acid to the quizalofop-p-ethyl is 1:50-50: 1; the weight ratio of the oxazalic acid to the quizalofop-p-ethyl is 1:20-20: 1; the total weight percentage of the oxazalic acid and the quizalofop-p-ethyl in the composition is 5-90%; the total weight percentage of the oxazalic acid and the quizalofop-p-ethyl in the composition is 10-75%; the formulation of the composition can be one of wettable powder, missible oil, dispersible oil suspending agent, soluble solution, suspending agent, microemulsion, emulsion in water, water dispersible granule and the like; the mixed herbicide is used for preventing and removing gramineous weeds of woody seedlings; the composition has obvious synergistic effect and can be used for preventing and treating gramineous weeds of woody seedlings.

Description

Mixed herbicide containing oxadiargyl and quizalofop-p-ethyl

Technical Field

The invention relates to the technical field of pesticides, and particularly relates to a mixed herbicide containing oxadiargyl and quizalofop-p-ethyl.

Background

The oxadiargyl belongs to aryloxy phenoxy propionate selective herbicide, is an acetyl coenzyme A carboxylase (ACCase) inhibitor, is quickly absorbed by weed leaves after being treated, is transmitted to the whole plant, is accumulated in meristems, inhibits the activity of the acetyl coenzyme A carboxylase in the weed body, leads the synthesis of fatty acid to be blocked, kills weeds, is mainly used for preventing and killing numerous annual and perennial gramineous weeds, and has the best effect of pesticide application in the seedling stage and the growth stage of the weeds.

Quizalofop-p-ethyl is an aryloxide herbicide, plays a role mainly by inhibiting cell division and growth, can effectively prevent and kill a plurality of annual gramineous weeds, such as lolium multiflorum, digitaria sanguinalis, eleusine indica and the like, can be used for weeding in corn fields and soybean fields before planting or before emergence, and before planting or in potatoes and sunflowers, and also can be used for weeding after emergence of crops such as wheat, barley, rice, corn and the like.

The compounding of the herbicides can solve the problems of high toxicity and poor effect of a single pesticide, the investment is low, the research and development period is short, the generation of drug resistance of an agent can be delayed by the interactive use of different pesticides, and the herbicide has an ideal use effect, so that the compounding of the pesticides with different action mechanisms is a research hotspot in the field of the current pesticides, and no compound weeding composition of the oxadiargyl and the quizalofop-p-ethyl exists in the prior art.

Disclosure of Invention

The invention aims to provide a herbicide composition which has reasonable components, low application cost and difficult drug resistance, has better control effect on gramineous weeds including intractable gramineous weeds 'cogongrass' in woody nursery stocks, and has positive effects on the aspects of retarding weed resistance, reducing the dosage of drugs and the like.

In order to achieve the purpose, the invention provides the following technical scheme:

the active ingredients of the mixed herbicide comprise the oxalic acid and the quizalofop-p-ethyl, and the weight ratio of the oxalic acid to the quizalofop-p-ethyl is 1:80-80: 1.

Further, the weight ratio of the oxazalic acid to the quizalofop-p-ethyl is 1:50-50: 1.

Further, the weight ratio of the oxazalic acid to the quizalofop-p-ethyl is 1:20-20: 1.

Further, the total weight percentage of the oxazalic acid and the quizalofop-p-ethyl in the composition is 5-90%.

Further, the total weight percentage of the oxazalic acid and the quizalofop-p-ethyl in the composition is 10-75%.

Furthermore, the formulation of the composition can be one of wettable powder, missible oil, dispersible oil suspending agent, soluble solution, suspending agent, microemulsion, emulsion in water, water dispersible granule and the like.

Further, the mixed herbicide is used for preventing and removing gramineous weeds of woody seedlings.

The suspending agent comprises the following components in percentage by weight: 1-50% of oxa-oxalic acid, 1-50% of quizalofop-p-ethyl, 1-15% of dispersant, 1-15% of wetting agent, 1-3% of thickening agent, 1-2% of antifreezing agent, 1-3% of defoaming agent and deionized water carrier, and the balance is up to 100%; the specific production steps are as follows: mixing the effective components with other auxiliary agents, and performing high-speed shearing dispersion and sanding in a sand mill to form a high-dispersion stable suspension system in a water system medium to prepare the suspending agent with corresponding weight percentage content.

The oil suspending agent comprises the following components in percentage by weight: 1-50% of oxa-oxalic acid, 1-50% of quizalofop-p-ethyl, 1-14% of dispersant, 1-10% of wetting agent, 1-3% of thickening agent and the balance of liquid carrier to 100%; the specific production steps are as follows: mixing the effective components with other auxiliary agents, and forming a highly dispersed and stable suspension system in an oil system medium after high-speed shearing dispersion and sanding in a sand mill to prepare the oil suspending agent with corresponding weight percentage content.

The water dispersible granule comprises the following components in percentage by weight: 1-50% of oxa-oxalic acid, 1-50% of quizalofop-p-ethyl, 1-12% of dispersing agent, 1-15% of wetting agent, 1-5% of disintegrating agent and the balance of solid carrier to 100%; the specific production steps are as follows: the active ingredients and other auxiliary agents are uniformly mixed, crushed by an ultramicro jet mill, kneaded, and then added into a fluidized bed granulation dryer for granulation, drying and screening to prepare the water dispersible granules with corresponding weight percentage content.

The wettable powder comprises the following components in percentage by weight: 1-50% of oxa-oxalic acid, 1-50% of quizalofop-p-ethyl, 1-15% of dispersing agent, 1-10% of wetting agent and solid carrier which is complemented to 100%; the specific production steps are as follows: mixing the effective components with other auxiliary agents, mechanically crushing, then carrying out airflow crushing, and uniformly mixing to prepare the wettable powder with corresponding weight percentage content.

The defoaming agent can be one or more of silicone compounds, epoxidized soybean oil, methanol, silicone oil and the like.

The antifreezing agent can be one or more of glycerol, propylene glycol, diethylene glycol, urea and the like.

The wetting agent can be one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium butyl naphthalene sulfonate, sodium alkyl sulfonate, tea seed cake powder, fructus Gleditsiae Abnormalis powder, and fructus Sapindi Mukouossi powder.

The dispersing agent can be one or more of alkylphenol polyoxyethylene ether formaldehyde condensate, naphthalenesulfonate formaldehyde condensate, p-methoxyl fatty amide benzene sulfonic acid, lignosulfonate, polycarboxylate, alkylphenol polyoxyethylene ether sulfate, calcium alkylbenzene sulfonate, fatty acid ester sulfate, alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and the like.

The disintegrating agent can be one or more of sodium carboxymethyl starch, low-substituted hydroxypropyl cellulose, croscarmellose sodium, crospovidone, chitosan, sodium alginate sodium bicarbonate, magnesium chloride, aluminum chloride, sodium chloride, urea, ammonium sulfate, bentonite, etc.

The thickener can be one or more of polyvinyl acetate, xanthan gum, gelatin, gum arabic, magnesium aluminum silicate, phenolic resin, hydroxymethyl cellulose, sodium alginate, etc.

The solid carrier can be one or more of light calcium carbonate, argil, kaolin, diatomite, bentonite, white carbon black, clay, attapulgite, talcum powder, quartz sand and the like.

The liquid carrier can be one or more of refined soybean oil, corn oil, rapeseed oil, turpentine, methyl oleate, coconut oil, palm oil, etc.

The deionized water is industrial deionized water.

The mixed herbicide disclosed by the invention is used for preventing and removing weeds, and is preferably used for preventing and treating gramineous weeds in woody seedlings such as ligustrum lucidum ait, photinia fraseri, red juglandis, buxus sinica and platycladus orientalis.

The invention has the following beneficial technical effects:

the composition combines two active ingredients with different action mechanisms, can effectively reduce the generation of drug resistance of weeds, and expands the weed control spectrum; can control gramineous weeds including intractable gramineous weeds 'cogongrass'; the weeding composition provided by the invention has a remarkable synergistic effect, the dosage of a single compound is reduced, a good action level is maintained, the weed control spectrum is remarkably broadened, and the environmental pollution is reduced.

Drawings

Fig. 1 is a flow chart of the inventive mixed herbicide containing oxadiargyl and quizalofop-p-ethyl.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The following detailed description of specific embodiments of the present invention is provided in conjunction with examples, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Example 1: and (3) measuring the indoor toxicity of the oxadiargyl and quizalofop-p-ethyl to the barnyard grass.

Test materials: cogongrass rhizome.

The test method comprises the following steps: the small cup method. Taking a 50ml beaker, and filling double-layer filter paper at the bottom of the beaker; adding 5ml of medicinal liquid with system concentration into each beaker, selecting 10-12 seeds of the imperata cylindrical with the same size and bud length, and sowing the seeds in the beaker; placing all treatments in an artificial climate box for moisture preservation and culture; after the treatment for 4d, the fresh weight was measured, and the growth inhibition rate, which is (fresh weight of control-fresh weight of treatment)/fresh weight of control x 100%, was calculated, and regression analysis was performed using DPS standard software to obtain an EC50 value, and the cotoxicity coefficient (CTC) was calculated according to the grandpeper method.

When CTC is less than or equal to 80, the composition shows antagonism, when CTC is less than or equal to 80, the composition shows additive action, when CTC is greater than or equal to 120, the composition shows synergistic action.

Measured virulence index (ATI) ═ (standard agent EC 50/test agent EC50) × 100;

theoretical virulence index (TTI) ═ a agent virulence index × percentage of a in the mixture + B agent virulence index × percentage of B in the mixture;

co-toxicity coefficient (CTC) × 100 [ measured toxicity index (ATI) of the mixture)/Theoretical Toxicity Index (TTI) of the mixture ].

TABLE 1 indoor toxicity assay for barnyard grass by oxadiargyl and quizalofop-p-ethyl

Table 1:

as can be seen from the table above, the weight ratio of the oxadiargyl to the quizalofop-p-ethyl compound is within the range of 1:50-50:1, so that the cloaca crusgalli compound has obvious synergistic effect, the pesticide dosage can be effectively reduced, and the generation of drug resistance of weeds is slowed down.

Example 2 formulation example.

Preparation 1: 28% oxa-oxalic acid quizalofop-p-ethyl oil suspension:

oxaoxalic acid 14%;

quizalofop-p-ethyl 14%;

6 percent of sodium dodecyl sulfate;

6% of sodium lignosulfonate;

3% of sodium alginate;

turpentine is complemented by 100%;

preparation 2: 30% oxaoxalic acid quizalofop-p-ethyl suspending agent:

5% of oxaoxalic acid;

25% of quizalofop-p-ethyl;

8 percent of sodium dodecyl sulfate;

5% of sodium lignosulfonate;

4% of agricultural milk;

3% of magnesium aluminum silicate;

4% of propylene glycol;

2% of organic silicon;

water is added to make up to 100 percent;

preparation 3: 48% oxa-oxalic acid quizalofop-p-ethyl wettable powder:

oxalic acid 40%;

8% of quizalofop-p-ethyl;

4% of sodium lignosulfonate;

4% of alkylphenol polyoxyethylene ether sulfate;

3% of urea;

3% of sodium alginate;

6% of white carbon black;

bentonite to 100%;

example 3: the oxazalic acid and quizalofop-p-ethyl are compounded to have the control effect on gramineous weeds in nursery stocks.

Test subjects: barnyard grass, crab grass, cyperus rotundus, alopecurus, eleusine indica and the like.

Test agents: formulations 1-4 agents and control agents;

the test method comprises the following steps: weighing the agents according to the area of a test cell, diluting the agents by adding water, spraying stems and leaves for 1 time by using a knapsack sprayer when the weeds are in a 2-3 leaf stage, investigating the fresh weight control effect after 21 days, and comparing the weeding activity of various agents, wherein the control effect (%) [ (fresh weight of the weeds in a clear water control group-fresh weight of the weeds in a treatment group)/fresh weight of the weeds in a clear water group ]. 100%.

Table 2 the control effect of the complex formulation of oxadiargyl and quizalofop-p-ethyl on grass weeds in nursery stocks;

table 2:

test agent	Application amount of active ingredient (gai/mu)	Total control effect%
			Preparation 1	12	90.6
Preparation 2	15	92.3
			Preparation 3	11	94.2
Preparation 4	13	91.5
			15% oxaoxalic acid wettable powder	5	56.3
41% quizalofop-p-ethyl suspending agent	7	49.2
			ck	—	—

As can be seen from the above table, compared with a single agent, the compound application of the oxazalic acid and the quizalofop-p-ethyl can expand the weeding spectrum, remarkably improve the control effect of the oxazalofop-ethyl on weeds, have remarkable synergistic effect, effectively reduce the application dosage of pesticides, and reduce environmental pollution; and the field observation is safe and reliable for the nursery stock.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A mixed herbicide containing oxadiargyl and quizalofop-p-ethyl is characterized in that: the active ingredients consist of oxalic acid and flufenacet, and the weight ratio of the oxalic acid to the quizalofop-p-ethyl is 1:80-80: 1.

2. The mixed herbicide containing oxadiargyl and quizalofop-p-ethyl as claimed in claim 1, wherein: the weight ratio of the oxazalic acid to the quizalofop-p-ethyl is 1:50-50: 1.

3. The mixed herbicide containing oxadiargyl and quizalofop-p-ethyl as claimed in claim 2, wherein: the weight ratio of the oxazalic acid to the quizalofop-p-ethyl is 1:20-20: 1.

4. A mixed herbicide containing oxadiargyl and quizalofop-p-ethyl as claimed in claims 1 to 3, characterized in that: the total weight percentage of the oxazalic acid and the quizalofop-p-ethyl in the composition is 5-90%.

5. The mixed herbicide containing oxadiargyl and quizalofop-p-ethyl as claimed in claim 4, wherein: the total weight percentage of the oxazalic acid and the quizalofop-p-ethyl in the composition is 10-75%.

6. A mixed herbicide containing oxadiargyl and quizalofop-p-ethyl as claimed in claims 1 to 5, characterized in that: the formulation of the composition can be one of wettable powder, missible oil, dispersible oil suspending agent, soluble solution, suspending agent, microemulsion, emulsion in water, water dispersible granule and the like.

7. A mixed herbicide containing oxadiargyl and quizalofop-p-ethyl as claimed in claims 1 to 6, characterized in that: the mixed herbicide is used for preventing and removing gramineous weeds of woody seedlings.